Video: Documents Point to ATF “Gun Running” Since 2008

A controversial operation in which U.S. agents were allegedly ordered not to intervene as American guns flowed to Mexican gangs may have been going on for many years, reports CBS News investigative correspondent Sharyl Attkisson.

The Bureau of Alcohol, Tobacco, Firearms and Explosives allegedly let gun runners walk off with weapons – thousands of them – to see if they’d end up in the hands of the cartels. The Justice Department and ATF have denied it ever happened.

Special Agent John Dodson works in ATF’s Phoenix office and has blown the whistle on the controversial strategy, known as letting guns “walk.”